21926648 has 8 divisors (see below), whose sum is σ = 41112480. Its totient is φ = 10963320.

The previous prime is 21926647. The next prime is 21926669. The reversal of 21926648 is 84662912.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21926647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1370408 + ... + 1370423.

It is an arithmetic number, because the mean of its divisors is an integer number (5139060).

Almost surely, 2^21926648 is an apocalyptic number.

It is an amenable number.

21926648 is a deficient number, since it is larger than the sum of its proper divisors (19185832).

21926648 is a wasteful number, since it uses less digits than its factorization.

21926648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740837 (or 2740833 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 21926648 is about 4682.5898816787. The cubic root of 21926648 is about 279.8921693631.

The spelling of 21926648 in words is "twenty-one million, nine hundred twenty-six thousand, six hundred forty-eight".